Biology Ch2 Review

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Study Guide for Chapter 2 Vocab and Questions regarding the content of Chapter 2. This chapter is located in the 2004 version of the Glencoe Biology Dynamics of Life.

Ecology

the study of interactions that take place between organisms and their environment

Biosphere

the portion of earth that supports living things

Abiotic Factors

all nonliving parts of an organism's environment

Biotic Factors

all the living organisms that inhabit an environment

Population

a group of organisms, all of the same species, which interbreed and live in the same area at the same time

Biological Community

is made up of interacting populations in a certain area at a certain time

Ecosystem

made up of interacting populations in a biological community and the community's abioic factors

Terrestrial Ecosystems

ecosystems located on land

Habitat

the place where an organism lives out its life

Niche

all the strategies and adaptations a species uses in its enviornment, its purpose

Symbiosis

The relationship in which there is a close and permanent association between organisms of different species

Mutualism

both species benefit for the relationship, +,+

Commensalism

a relationship in which one species benefits and the other neither benefits nor is harmed from it, +,0

Parasitism

a relationship where one species dervies benefit at the expense of another species, +,-

Predation

where organisms seek out and eat other animals

Autotroph

An organism that uses light energy or energy stored in chemical compounds. also called the producer

Heterotroph

An organism that cannont make its own food and feeds on other organisms

Decomposers

break down complex compounds of dead and decaying plants an animals into simpler substances

Food Chain

a simple model that scientists use to show how matter and energy move through an ecosystem.

Trophic Level

each organism in a food chain represents a feeding step or ....

Food Web

shows all possible feeding relationships at each trophic level in a community

Biomass

the total weight of living matter at each trophic level.

Ecology

the study of plants and animals, including where they grow and live, what they eat, or what eats them is called__

Herbivores

heterotrophs that only feed on plants

Carnivores

heterotrophs that eat other heterotrophs

Scavangers

heterotrophs that do not kill for food, rather they eat animals that have already died

Omnivore

heterotrophs that eat both plants and animals

food chains and food webs

How does energy and matter flow through ecosystems

only a portion of the first transfer

The amount of energy remaining in the final transfers is___

Producers

a first order heterotroph is an organism that feeds on___

first order heterotroph

a second order heterotroph is an organism that feeds on___

ecological pyramid

a model to show the distribution of matter and energy within a community

total available energy in a community

The base of the ecological pyramid represents____

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